diff options
| author | Dominik Brodowski <linux@dominikbrodowski.net> | 2018-03-11 13:34:49 +0300 |
|---|---|---|
| committer | Dominik Brodowski <linux@dominikbrodowski.net> | 2018-04-02 21:15:55 +0300 |
| commit | b724e846b491ef8db943be8086226c9d8da31877 (patch) | |
| tree | c82f7920140d95ee99622b5201db91081f764f3f /include | |
| parent | 0101db7a301981a008296d522d8c1f456b0fe837 (diff) | |
| download | linux-b724e846b491ef8db943be8086226c9d8da31877.tar.xz | |
fs: add do_symlinkat() helper and ksys_symlink() wrapper; remove in-kernel calls to syscall
Using the fs-internal do_symlinkat() helper allows us to get rid of
fs-internal calls to the sys_symlinkat() syscall.
Introducing the ksys_symlink() wrapper allows us to avoid the in-kernel
calls to the sys_symlink() syscall. The ksys_ prefix denotes that this
function is meant as a drop-in replacement for the syscall. In particular,
it uses the same calling convention as sys_symlink().
This patch is part of a series which removes in-kernel calls to syscalls.
On this basis, the syscall entry path can be streamlined. For details, see
http://lkml.kernel.org/r/20180325162527.GA17492@light.dominikbrodowski.net
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/syscalls.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h index c982cb5f4e50..39c5cef86a10 100644 --- a/include/linux/syscalls.h +++ b/include/linux/syscalls.h @@ -979,4 +979,13 @@ static inline long ksys_mkdir(const char __user *pathname, umode_t mode) return do_mkdirat(AT_FDCWD, pathname, mode); } +extern long do_symlinkat(const char __user *oldname, int newdfd, + const char __user *newname); + +static inline long ksys_symlink(const char __user *oldname, + const char __user *newname) +{ + return do_symlinkat(oldname, AT_FDCWD, newname); +} + #endif |